I use Thunder on Android for my lemmy.zip account.
Interstellar for my kbin.earth and fedia.io accounts.
Trying out piefed with piefed.social because of their Topics and custom feeds. No "release ready" mobile apps yet, but IIRC either Interstellar or Thunder is trying out supporting piefed.
I think I'm going to like piefed for the custom feeds. That's my most missed function from reddit, the multireddits. Their default Topics works well enough, but I have my opinions on it, and piefed allow I can set my own.
I don't really use other fedithings. I'm like the normies, I want some kind of algo-feeding for microblogging and whatever instagram is categorised as, except for the threadiverse/reddit-like.
One of the reason I can think of is some kind of "match" making. idk I never played with randoms. I especially do not want to play with randoms in a game that "requires" mic input for the monster mechanics.
Also probably P2P or player-hosted is such a foreign concept nowadays, since almost anything online-only is all centralized.